i love everything, apart from the unit frames :S if i should change anything, i would remove all those useless buttons you have down to the right (do you need all your mounts out? and HS, gruntling etc?), or keybind those you need, and then hide the bars... I would then throw grid there, to show the raid frames, and hide the party frames for good. I would use something like pitbull (my personal favorite, but there are lots), and then place the unitframe of yourself and target a bit above your castbar... but thats just my opinion thumbs up!

as for my UI, i basically use a little modified caith UI v.15... nothing special

What's the name of that add on that shows a frame with the animated face of your character and your target?

One of several Unitframe addons usually.
Stuf, Shadowed Unit Frames, Pitbull 4, oUF are all common options, and there are more still.
If you can get a screenshort of one in particular it may help narrow it down.
You can give us the text of the link I understand if you ommit the http:// or the www. or something like that because of your post total.

stUF, Pitbull 4, and Shadowed Unitframes should all be able to create something similar in appearance to that.
Though due to the better layout options, stUF will likely be able to reproduce it more accurately.